Effects of pretreatment in post space on the bonding strength of self-adhesive resin cement to fiber posts

doi:10.3969/j.issn.2095-4344.2016.47.013

Abstract

Abstract:

BACKGROUND: The bonding interface of resin cements with dentin is unstables, therefore, improvement on the bonding strength is of great significance.
OBJECTIVE: To evaluate the effects of different pretreatments to post space on bonding strength of the self-adhesive resin cement EmbraceCoreTM Resin Cement to fiber posts after phosphoric acid etching or self-etching.
METHODS: Twenty-five human mandible canines or premolars with single-rooted canal were selected. After conventional root canal treatment and post space preparation, they were randomly divided into five groups (n=5 per group): group I (control group): 0.9% normal saline irrigation; group II: etching with 35% phosphoric acid for 15 seconds; group III: self-etching with CLEARFILTM SE BOND binder for 20 seconds; group IV: etching with 35% phosphoric acid for 15 seconds and bonding with single bong 2; group V: self-etching with CLEARFILTM SE BOND binder for 20 seconds and bonding with CLEARFILTM SE BOND binder. Fiber posts were edusing self-adhesive resin cement EmbraceCoreTM Resin Cement. The thin-slice push-out test was performed to record the bonding strengths, and the failure modes of fiber posts were observed by stereomicroscope.
RESULTS AND CONCLUSION: The bond strength of groups I-V were as follows: (8.66±2.43), (7.05±3.0), (7.37±2.83), (9.88±2.9), and (10.04±2.86) MPa. Groups II, IV and V showed significantly different bond strength from the group I (P < 0.05), but there were no significant differences between groups III and I (P > 0.05). The main failure models in the groups I, II and III were A1 and A2, and less B1 and B2 appeared. The failure modes in the groups IV and V also focused on the A1 and A2, but B1 and B2 increased gradually. These results indicate that neither the pretreatments by phosphoric acid etching nor by self-etching in root canal dentin can improve the bonding strength of EmbraceCoreTM Resin Cement to fiber posts, but the use of binder relative to phosphoric acid etching or self-ctching is helpful.

中国组织工程研究杂志出版内容重点：生物材料；骨生物材料; 口腔生物材料; 纳米材料; 缓释材料; 材料相容性；组织工程

Key words: Tooth Preparation, Prosthodontic, Dental Cement, Tissue Engineering

CLC Number:

R318

Feng Xin-yan, Gao Cheng-zhi. Effects of pretreatment in post space on the bonding strength of self-adhesive resin cement to fiber posts[J]. Chinese Journal of Tissue Engineering Research, 2016, 20(47): 7083-7089.

Figures/Tables 2

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